In Java EE 5, the availability of the application.xml deployment descriptor in the Enterprise Application archive is optional. If the application.xml is missing, the system scans the archive for available modules there.
By default, the Developer Studio does not generate this deployment descriptor in Enterprise Application projects. There are options to add it if you want.
In the Project Explorer , select the Enterprise Application project.
In the context menu, choose
.The application.xml appears in the META-INF directory of the Enterprise Application project.